I converted an MR E to the Pilot version for a customer last year. He said he was going to post a review with lots of pics, but he never did :confused
There is no beige or white needed in the color.
I started with model master grey (I forget which one...maybe light ghost gray) and added medium flat GREEN and a few drops of black until I got a perfect match. I don't have the formula anymore, sorry.
I test sprayed an area on the underside to verify the match. It was exact. So GREEN is the key.
REMEMBER...clear costing afterwards can darken the color by as much as 20%, but if you are just doing spot-repairs, you should be fine.